Santa Cruz, CA
831.421.9291
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Portland, OR
503.227.5979
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Fish Passage & Screening
Watershed/ Geomorphic Assessments
River & Wetland Restoration Design
Stormwater & Flood Control Planning & Design
Restoration Planning
Land Surveying
Hydrologic & Hydraulic Modeling, Analysis, & Gauging
Civil & Structural Design
Reclamation & Erosion Control
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Central California
Northern Cal-Nevada
Pacific Northwest
Southern California
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Ecological Restoration Design
Natural Resource Management
Civil/ Water Resources Engineering
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Construction Support Services
About Us
Our Company
Our Staff
John Dvorsky, MS
Matt Weld, PE, CFM, CPESC
Brian Smith, PE, MS
Brent Zacharia, PE, MS
Daniel Malmon, Ph.D.
Denis Ruttenberg, PE, MS
Jake Hofeld, PE
Barry Tanaka, PE, MS
Deanna Hutchinson, PE
Carter Hayes
Mark Lovrin
Kevin Bagley
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Project Menu
Pacific Northwest Project Portfolio
Murtaugh Creek Fish Passage
Half Mile Lane Mitigation Bank
Gooseneck Creek Restoration
Gales Creek Restoration Planning
Clackamas County Water Environment Services Action Planning & Geomorphic Monitoring
Fox Creek Restoration Plan
Salmon and Cox Creek Fish Barrier Improvement Project
Scappoose Bay Restoration Plan
South Fork Necanicum Fish Passage Improvement Project
Jackson Creek Restoration Plan
Dairy Creek- Sturgeon Lake Restoration
North Fork Deep Creek Habitat Enhancement Project
Rinearson Creek Natural Area Restoration
Milton Creek Large Wood Enhancement Project
East Valley Mine Wetland Mitigation Project
Hillsboro Landfill Wetlands Outfall Channel and No-Rise Documentation
Mill Creek Side Channel Restoration
Lower Clatskanie Floodplain Restoration
Batwater Station Floodplain Enhancement Project
Lower Cottonwood Creek Points of Diversion Modification Projects
Seestrom Tidal Floodplain Restoration
Northern Cal-Nevada Project Portfolio
Blackwood Creek Stream Restoration
Edgewood Creek Watershed Assessment, Enhancement Plan, & Restoration
Kunzler Ranch Gravel Extraction
Cold Creek/ High Meadow Ecosystem Restoration
St. Helena Comprehensive Flood Protection Plan
Perazzo Meadows Geomorphic Assessment
Russian River Projects
Sonoma County Fish Passage Projects
Trout Creek Restoration
Upper Carson River Watershed Assessment
Big Meadow Creek Watershed Assessment
Hope Valley Meadow Restoration
Coldstream Floodplain Enhancement Project
Independence Lake Log Cribwall and Fish Barrier Design
Hat Creek Restoration
Faith Valley Meadow Restoration
Central California Project Portfolio
Aptos Creek Watershed Assessment and Enhancement Plan
Camp Pico Blanco Fish Ladder and Dam Retrofit
San Lorenzo River Monitoring
Corralitos Creek Bank Stabilization
Watsonville Sloughs Manabe Property Wetland Restoration
Quail Hollow Bridge Replacement and Channel Restoration
Salmonid Enhancement Plan for the San Lorenzo River
City of Santa Cruz Watershed Management Plan
Valencia Creek Fish Ladder
Watsonville Sloughs Landfill Site Restoration near Ramsay Park
Watsonville Trails Master Plans (Phases 1 & 2)
Zayante Area Sediment Source Reduction Plan
Sycamore Creek Bank Stabilization
Pajaro River Care Project
Geyer Quarry Restoration Plan
Eureka Canyon Bridge Replacement and Fish Passage Improvements @ Koinonia Conference Center
Mitchell Creek Dam Removals & Fish Passage Improvements
Potrero Hills Wetland Mitigation
Attiyeh Ranch Conservation Easement
West Valley College Stream and Wetland Enhancement and Riparian Trail Plan
Fall Creek Fish Ladder
Soquel Creek Floodplain Restoration
North Monterey County High School Nature Area Design Project
Mill Creek Dam Removal
Southern California Project Portfolio
Gobernador Creek Bridge Replacement and Fish Passage Improvements - Widdoes Residence
Arroyo Grande Creek Channel Flood Mitigation
Morro Fish Review
Rodriguez Fish Passage Project
Pismo Creek Fish Passage Project
Tally Ho Channel Assessment
Circle G Ranch Fish Passage Improvement
Arroyo Burro Open Space Restoration
Gaviota Creek Fish Passage Improvements